CVE-2026-29905

MEDIUM EPSS 35.6%
Published Mar 26, 20263mo ago · Modified Jun 17, 20262w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Mar 26, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a persistent Denial of Service (DoS) via a malformed image upload. The application fails to properly validate the return value of the PHP getimagesize() function. When the system attempts to process this file for metadata or thumbnail generation, it triggers a fatal TypeError.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
35.6% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-20 Improper Input Validation Validation
CWE-252

Affected Products 1

VendorProductVersionRange
getkirbykirby* ≤5.1.4

References 3

  • drive.google.com https://drive.google.com/file/d/1MwvvSYIwnC8kOIzjycGMQZw4d2K2ef8h/view?usp=sharing
    Exploit
  • github.com https://github.com/Stalin-143/CVE-2026-29905
    Third Party Advisory
  • github.com https://github.com/getkirby/kirby/releases/tag/5.2.0-rc.1
    Product

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.